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KMID : 1134820160450050696
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Journal of the Korean Society of Food Science and Nutrition
2016 Volume.45 No. 5 p.696 ~ p.701
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Tricin and Tricin 4'-O-(Threo-β-Guaiacylglyceryl) Ether Contents of Rice Hull (Oryza sativa L.) with Heat Treatment and Germination
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Yoon Na-ra
Jang Gwi-Yeong
Lee Yoon-Jeong
Li Meishan
Kim Min-Young
Kim Hyun-Young
Lee Jun-Soo
Jeong Heon-Sang
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Abstract
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This study was conducted to evaluate the effects of heat treatment and germination on tricin and tricin 4'-O-(threo-β-guaiacylglyceryl) ether (TTGE) formation from rice hull (Oryza sativa L.). Heat treatments were conducted at 80∼140°C for 1∼5 h. Germination periods were 1∼6 days at 37°C. Germinated rough rice extracts were classified as non-filtrated, filtrated, and residue after filtration. For heat treatment, the highest contents of tricin and TTGE were 253.12 and 208.39 μg/g at 130°C after 1 h, respectively. For germination, the highest contents of tricin and TTGE in rice hull were 118.20 and 95.37 μg/g after 2 days, respectively. In the germinated rough rice extract treatment, the highest contents of tricin and TTGE were 361.76 and 308.08 μg/g, respectively, in residue after filtration of germinated rice extract for 6 days. Therefore, the optimum conditions for tricin and TTGE formation were heat treatment at 130°C for 1 h, germination for 2 days, and addition of residue after filtration of germinated rough rice extract for 6 days.
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KEYWORD
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rice hull, tricin, tricin 4'-O-(threo-β-guaiacylglyceryl) ether, heat treatment, germination
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